Which statement correctly describes the relationship between association and correlation?

All associations are correlations.

All correlations are associations.

Association and correlation are unrelated concepts.

If there is no correlation, there can be no association.

A scatter plot shows that as the speed of a car increases, its fuel efficiency increases up to a point, then decreases. How is this relationship best described?

Association but not a linear correlation

Yes, because any positive trend is a positive correlation.

No, because the relationship could be a curve instead of a straight line.

Yes, because association and correlation mean the same thing.

No, because a positive trend could still have a negative correlation.